A firm's current balance sheet is as follows:

Assets

$$140$

Debt

$$42$

Equity $$98$

a$.$ What is the firm's weighted$-$average cost of capital at various combinations of debt and equity, given the following information? Round your answers to one decimal place.

$\backslash$table$[[$Debt$/$Assets$,$After$-$Tax Cost of Debt,Cost of Equity,Cost of Capital$],[0\%,6\%,13\%,{}_{\%}$